212315740 has 48 divisors (see below), whose sum is σ = 548759232. Its totient is φ = 67193856.

The previous prime is 212315723. The next prime is 212315777. The reversal of 212315740 is 47513212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56509 + ... + 60148.

It is an arithmetic number, because the mean of its divisors is an integer number (11432484).

Almost surely, 2^212315740 is an apocalyptic number.

212315740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212315740 is an abundant number, since it is smaller than the sum of its proper divisors (336443492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212315740 is a wasteful number, since it uses less digits than its factorization.

212315740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116686 (or 116684 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 212315740 is about 14571.0583006177. The cubic root of 212315740 is about 596.5690667043.

Adding to 212315740 its reverse (47513212), we get a palindrome (259828952).

The spelling of 212315740 in words is "two hundred twelve million, three hundred fifteen thousand, seven hundred forty".